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TPS54360B: 24V输入生成负15V电压,电压起不来

Part Number: TPS54360B


我想用两个TPS54360BDDAR生成+15V/3A和-15V/3A,电路图如下:

电路板上电后,输入电源拉到0.2V,电源CC保护,但是量了一下,电路板并没有短路;
拆掉生成负电压的芯片,正电压正常工作。

麻烦帮忙排查一下,下面是电路板的布局